***Official SAT II Biology E/M Study Thread***

<p>A lot of people are taking this test and there are only 3 days left so I think this would be really helpful. I will start off the first question:</p>

<p>What enzymes are responsible for breaking down these macromolecules?:
Carbohydrates
Lipids
Proteins
Nucleic acids</p>

<p>By the way what books are you guys using and what are you concentrating on?</p>

<p>ok i ll start of ..for the BOok i am using barrons, and its still too early to decide what to concentrate on ( i am almost done with the book but like..lol)
As for the question
Carbs : Salviary Amylase, Pancreatic Amylase
Lipids : Bile Salts for emulsification, then Lipase
Protiens: Pepsin in the stomach,... and i think trpsin and aminopeptidase?
Nucleic Acids : Nucleosidese, Nucleotidase, Nuclease</p>

<p>OK my question
What are the functions of the following hormones And what are there antagonists (like the hormone that works against it) ...</p>

<p>Glucagon </p>

<p>Calciton</p>

<p>Glucagon Turns Blood Sugar to Glycogen, Insulin is the op. and turns Glycogen to Glucose.</p>

<p>Calcitonin- Incorporates Calcium into Bones and Parathyroid Hormone - Opposite?</p>

<p>For proteins it is also chymotrypsinand they are stored as zymogens.</p>

<p>Glucagon-stimulates liver cells to break down glycogen into glucose.
antagonist-insulin
Calciton-lowers blood calcium
antagonist-parathormone</p>

<p>Next Question: What is adaptive radiation?</p>

<p>its when one species evoles and branches into many different species (SPeciation, that results in multiple species ) </p>

<p>example is insect casue most of them have common ansestor</p>

<p>question
What are the two types of vasuclar tissue ,their charateristics and their function (thats kind of easy)</p>

<p>oh and btw ..whats Zymogens?</p>

<p>zymogens-unactivated enzymes
eg.-pepsinogen,tripsinogen</p>

<p>xylem- only goes up, carries only mineral and water, in middle
phloem-any direction, carries food and stuff, on the outside</p>

<p>describe echinodermata</p>

<p>Tripoblastic Animals that Exhibt Bilatereal Symmtry as an embryo then shift to radial symmetry after development, usually move by water vasclar system, have a true Colem, (are invetebrates) and some of them have the power of regenertation Which is replacment of lost organs..
Example :Starfish</p>

<p>uhh lets see..... whats the difference between colonial immunity and cell-mediated immunity?</p>

<p>cell mediated immunity-mainly T-cells attacking nonself cells. Cytotoxic T-cells,macrophages and natural killer cells attacking and lysing infected cells.
humoral immunity-Activated by antigens. B-cells produce Y-shaped antibodies(immunoglobins) and divide to produce plasma cells and memory cells. Plasma cells attack and memory cells can recognize the antigen quickly the next time it comes.</p>

<p>Name the functions of the liver</p>

<p>produce bile and contains sugar as glycogen</p>

<p>what is amniocentesis?</p>

<p>Amniocentesis is a common prenatal test in which a small sample of the amniotic fluid surrounding the fetus is removed and examined.</p>

<p>Hmm . . . how is enzyme activity regulated?</p>

<p>inhibitors and regulators</p>